Abstract:
This experiment began in 1925 at a warm temperate subtropical site in Australia. The soil is described as a Rhodoxeralf (Soil Taxonomy) Alfisol. There are two different land-uses: cereal ley farming - fallow rotations 1925-1947 and cereal ley farming - fallow rotations 1948-present. In this experiment the different rotations under these land-uses form the different treatments as follows. During ... both periods (i.e. 1925-present): Continuous wheat, wheat-fallow, wheat-peas, wheat-pasture-fallow, wheat-oats-fallow, wheat-barley-peas, and wheat-oats-pasture-fallow. For first period only (i.e. 1925-1947): wheat-peas-fallow, wheat-barley-fallow, wheat-oats-peas, wheat-pasture. For second period only (i.e. 1948-present): wheat-wheat-pasture-pasture-pasture, wheat-pasture-pasture, wheat-pasture-fallow-fallow and from 1951 to present: permanent pasture.

The measurements made (data available), frequency, and methodology are:

Nearest meteorological station to the site: Waite Agricultural Research Institute which is .2 km from the site at coordinates 138deg.38min. East, 34deg.58min. South. The meteorological station is automatic.

Yield data available in electronic format from 1925 Total above-ground dry matter data available in electronic format from 1925 Total soil carbon data available in electronic format from 1963 Soil biomass carbon data available in electronic format from 1993 Data available in electronic format for carbon dioxide evolution from 1994 Data available in electronic format for total soil nitrogen from 1994 Data available in electronic format for soil nitrate nitrogen from 1994 Data available in electronic format for rainfall from 1925 Data available in electronic format for air temperature from 1925 Data available in electronic format for net radiation from 1966 Data available in electronic format for sun hours from 1970 Data available in electronic format for relative humidity from 1925

Description:
This url links to the GCTE-SOMNET home page where additional project information and methodology can be obtained. This site is currently in a datasharing phase of the network where actual data will become available shortly, at different levels of accessibility. Please follow this link for more information.

Width of smallest plot is 8.5 m Length of smallest plot is 60 m . Shape: Concave Details of direction of cultivation: Cultivated at right angles to long axis of plot Width of Bare Strip around plot: 45cm between plots

b) Details of replication, randomization and controls Designed x time. Each phase of a rotation is represented each year. Arboretum adjacent to the plots used as control. However, it may be difficult to find an undisturbed area.